植物根系对土壤水力参数影响的定量研究综述  

Review on Quantification of Root-induced Change of Soil Hydraulic Parameters

作　　者：鲁建荣 李云良[2] 谭志强[2] 姬明飞[1] 杨垒 BLarry Li LU Jianrong;LI Yunliang;TAN Zhiqiang;JI Mingfei;YANG Lei;BLarry Li(Collaborative Innovation Center of South-to-North Water Diversion Area of Henan Province,International Joint Laboratory of Watershed Ecological Security for Water Source Region of Middle Route Project of South-North Water Diversion in Henan Province,College of Water Resource and Environment Engineering,Nanyang Normal University,Nanyang,Henan 473061,China;Nanjing Institute of Geography and Limnology,Chinese Academy of Sciences,Nanjing 210008,China;Department of Environmental Sciences,University of California,Riverside,Riverside CA 92521,USA)

机构地区：[1]南阳师范学院水资源与环境工程学院,河南省南水北调水源区协同创新中心,河南省南水北调中线水源区流域生态安全国际联合实验室,河南南阳473061 [2]中国科学院南京地理与湖泊研究所,南京210008 [3]加州大学河滨分校环境科学系,河滨CA92521

出　　处：《土壤学报》2023年第4期939-952,共14页Acta Pedologica Sinica

基　　金：河南省科技攻关计划(222102320222);中国科学院青年创新促进会项目(Y9CJH01001);国家自然科学基金项目(42071036,42171104)共同资助.

摘　　要：植物根系是土壤结构以及土壤水力参数变化的重要影响要素。目前不仅缺乏定量描述“根-孔隙-土壤水力参数”相互作用的研究方法,在更大尺度上根系作用的客观表达也尚不明确,由此导致降雨入渗、径流和蒸发等流域水文过程的精细刻画与模拟预测具有很大的不确定性。基于文献检索,本文对国内外相关研究进行了回顾与梳理,量化了植物根系对土壤水力参数的改变和影响,并提出其与植被、土壤类型的响应方式,总结了植物根系动态性生长下的土壤水力参数定量表述及其预测模型进展。同时分析了在定量研究根-土复合系统中存在的问题及未来研究的发展方向,指出目前根系影响土壤水力参数的研究主要集中在小尺度控制实验方面,忽略了大尺度下土壤空间异质性及外部环境因素的干扰,强调大尺度根系作用和根系参数纳入土壤结构的重要性和实际意义,进一步与水文模型的深度耦合逐渐成为未来研究的热点。Plants roots are known as an important driving force for the change of soil structure and soil hydraulic parameters(SHP).However,there is a lack of appropriate modelling approaches to root-pore-SHP interactions with quantitative descriptions,which has led to knowledge gaps in the effects of roots on SHP at larger scales.A consequence of this gap is the bias in the simulation and prediction of hydrological processes such as infiltration,runoff and evaporation in catchments.In this paper,available literature is reviewed and used to quantify the changes and effects of plant roots on SHP.In addition,its relationships with plant and soil type are proposed.The quantitative expression of SHP and their prediction models under the dynamic growth of plant roots are summarized.This paper also analyzes problems and future research directions of the quantitative research on root-permeated soils.This study points out that the current research on SHP affecting roots focused on small-scale control experiments,ignoring the interference of soil spatial heterogeneity and environmental factors at large scales.Previous studies found contrasting root effects(on SHP)depending on which processes are dominant,including root growth(or decay)and the density and diameter of roots.Meanwhile,root-induced change of SHP was species(root characteristics),soil type,and time-dependent.Also,related studies indicated that the model’s accuracy and reliability would be improved when considering the temporal dynamics of roots induced by land cover/land use change and seasonal variations in SHP.Few efforts have been undertaken to incorporate root variables into soil function to predict SHP based on roots occupying the soil pore space,changing soil pore size distribution and soil pore network model.Neglecting root-induced change of SHP in hydrologic simulation may lead to high uncertainties.As the root-related dominant process at a larger scale is different to that in small-scale control experiments,there remain significant knowledge gaps that impede t

关 键 词：土壤水动力学 土壤孔径分布 土壤转换函数 根系特征 流域水文 耦合模型 

分 类 号：X143[环境科学与工程—环境科学]